Boat



Feb. 16, 1932. c, D, HANNA 1,845,495

BOAT I Filed Feb. 4, 1930 3 Sheets-Sheet 2 Feb. 16, 1932. c. D. HANNA BOAT Filed Feb. 4, 1930 3 Sheets-Sheet 5 M H m m c Patented Feb. 16,- 1932 res FATE

rarer.

CARL D. HANNA, OF BROOKLYN, NEW.YORK

BOAT

Application filed February character embodying propelling means of a construction and arrangement which will drive the boat through the water at a greatly increased speed with a given expenditure of power as compared with boats now in use.

Other objects of the invention are to provide a boat which will be very sea worthy, strong, durable, and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like charactors of reference designate corresponding parts throughout the several views, and wherein Figure 1 is a top plan view of a boat constructed in accordance with this invention.

Figure 2 is a view in side elevation thereof. Figure 3 is a vertical cross sectional view therethrough.

Figure 4 is a detail view in side elevation showing one of the closure disks of the depending propeller guard plate raised in a manner to expose the ad a-cent propeller.

Figure 5 is a fragmentary detail view on an enlarged scale in side elevation and partly in longitudinal section of one of the propellers.

Figure 6 is a vertical cross sectional view taken substantially on the line 66 of Figure 5 and looking in the direction of the arrows.

Figure 7 is a sectional view taken substantially on the line 77 of Figure 5 looking in i the direction of the arrows.

Referring to the drawings in detail, the reference character 1 designates generally the hull of the boat having the rounded stern portion 2 and the comparatrively pointed prow portion 3.

4, 1950; ser al No. 425,833.

' On opposite sides, and extending from the prow to the stern portion thereof, the hull 1 is shaped to provide longitudinally extending compartments &-4 which extenda substantial distance'abo've the water line of'the vessel, as illustrated to advantage in Figures 2 and 3 of the drawings. The compartments are open at their opposite ends for the entrance and exit of the waterwhen the boat is 111 motion; -Guard plates 55 constitute the outer walls of'the compartments l4,- as best seen in Figure 3 ofthe drawings -and VVhlChfOlHl a continuation of the side walls of the hull. The lower inner walls 21 of the compartments below the water :line extend i or slope downwardly 'and outwardly and meet the plates 5 5 adjacent the bottom of the hull.

At longitudinallyspaced points, the hull 1 has mountedfor rotation therein the horizontally disposed transversely extending propeller shafts 6 which have their opposite ends projecting into the compartments 44 at a point slightly above the water line of the boat and terminating substantially in the 5! plane of the guard plates or walls 55. Fixed on each end of the propeller shafts 6 is a propeller wheel designated generally by the referencenumeral7- and illustrated in detail in Figures 5,6 and? of the drawings. (lo-axially with the outer ends of the propellershafts 6'the guard plates '55 are provided with circular openings 8 of a diameterlarger'than the diameter of thepropeller wheels 7 to permit access to be had to the pro- 8 pellers 7 and for their attachment and re moval from the shaft 8 and, said openings 8 are closed through the medium of theflat closure disks or-plates 9 (see Figures 3 and l) hingedly'connected to the sides of the hull l as at 10 and provided with suitable means such as an eye bolt llto permit ahoisting cable'12 to be coupled thereto for the purpose of raising the closure disks to open position when it is so desired. The eyebolt 11 isturnably mounted in the door and carriedvby the inner end thereof is a catch member 22' which may be turned to engage or'dise'ngage the inner side of the outer plate 5. The propeller shafts 6 may be operatively connected in any suitable manner to any suitable type of power plant for actuation thereby.

Each of the propellers 7 comprises a hub portion 13 from the opposite end portion of which extends the outwardly converging conical side wall 14, as best seen in Figure 6. It will be seen that each of the propeller shafts 6 is provided with an annular stop flange 15 disposed within the respective compartments 44 for engagement by the inner end of the hub 13 and a flanged nut 16 is threaded into the outer end of the propeller shafts for securing the propellers thereon, but it is to be understood that the propellers may be fixed to the shafts 6 in any suitable manner. Paddles or vanes 17 are mounted on the conical side walls 14 of the propellers 7 and radiate from the opposite end portion of the hub 13 and said vanes are substantially triangular g0 in shape. The outer marginal edges 18 of the vanes 17 are straight and disposed at right angles to the hub 13 while the inner edges thereof conform to the conical side walls 14, as best seen in Figure 6. The outer or free ends of the vanes 17 are rounded and extend slightly beyond the periphery of the converged ends of the side walls 14. It will also be seen that the driving or water engaging face of each of the vanes 17 is concaved as indicated at 19 for the purpose oftrapping the water therein and causing the propeller to function at maximum efficiency. The outer front sides of the vanes 17 are provided with grooves or notches 20 to permit any water picked up by the vanes to quickly drain therefrom as each vane rises from the water. It is believed that the many advantages of a boat constructed in accordance with this invention will be readily understood, and al- 49 though the preferred embodiment of the invention is as illustrated and described, it is to be understood that the changes in the details of construction may be had which will fall within the scope of the invention as claimed; What is claimed is A boat of the class described comprising a hull having a longitudinally extending compartment in each side thereof, the upper part of which is above the water line and the 50 lower wall of which slopes downwardly and outwardly, a plate forming a continuation of a sideof the hull and covering the compartment, but leaving the ends thereof open whereby water can pass thru the compartw ment, a number of power wheels in each compartment, means for rotating the wheels, each plate having an opening therein of circular shape and of larger diameter than a wheel for entirely exposing the wheel, a cover plate a hingedly connected. to the plate at the top of the opening for covering said opening, and catch means for holding the cover plate in closed position.

In testimony whereof I afiix my signature. CARL D. HANNA. 

